how to give airdroid root permissions on kitkat?

i have a rooted S4 Mini on kitkat 4.4.2 now they have changed the permission so normal applications cannot write expect a given location on the external sd card. (which is not bad as security). but now i cant use airdroid to upload files to my mobile. so instead of allowing all applications to write on the external sd card. i want to give airdroid root so it can write on the external sd card in any location while the other applications are controlled by the new rule.